<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        div,
        h1,
        p,
        span,
        strong {
            border: 1px solid;
        }

        div,
        h1,
        p,
        span,
        strong {
            /* height: 100px; */
            width: 500px;

        }


        div,
        h1,
        p {
            /* margin: 50px; */
            padding: 50px;
        }

        span,
        strong {
            /* margin: 50px; */
            padding: 50px;
            display: inline-block;
        }
    </style>
</head>

<body>
    <div>这是一个div标签</div>
    <h1>这是一个标题标签</h1>
    <p>这是一个p标签</p>

    <span>这是一个span标签</span>
    <strong>这是一个strong标签</strong>
</body>

</html>